\begin{tikzpicture}
    \tkzDefPoints{0/0/A, 3/-2.5/C, 0/-1/b1, 3/0/d1}
    \tkzDefPointOnCircle[R = center C angle 165  radius 1] \tkzGetPoint{b2}
    \tkzDefPointOnCircle[R = center A angle 8    radius 1] \tkzGetPoint{d2}
    \tkzInterLL(A,b1)(C,b2)  \tkzGetPoint{B}
    \tkzInterLL(A,d2)(C,d1)  \tkzGetPoint{D}

    \tkzDrawPolygon(A,B,C,D)

    \tkzLabelPoints[left](A,B)
    \tkzLabelPoints[right](C,D)
\end{tikzpicture}

